A new serial Cretaceous planktic foraminifer (family Heterohelicidae Cushman, 1927) from the upper Maastrichtian of the equatorial Central Pacific

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doi: 10.1144/jm.27.2.117
Author(s): Georgescu, M. Dan; Abramovich, Sigal
Author Affiliation(s): Primary:
University of Calgary, Department of Geoscience, Calgary, AB, Canada
Other:
Ben Gurion University of the Negev, Israel
Volume Title: Journal of Micropalaeontology
Source: Journal of Micropalaeontology, Vol.27(Part 2), p.117-123. Publisher: British Micropalaeontological Society, London, United Kingdom. ISSN: 0262-821X
Note: In English. 25 refs.; illus., incl. sketch map
Summary: A new serial planktic foraminifer, Lipsonia lipsonae nov. gen., nov. sp., is reported from the Upper Maastrichtian sediments of the equatorial Central Pacific (Shatsky Rise). It presents raised sutures throughout, ornamentation consisting of coarse irregular structures on the early part of the test and smooth test surface in the adult stage. The absence of costate ornamentation suggests that the new taxon origins should probably be found in the contemporaneous non-costate species of the Laeviheterohelix glabrans-L. dentata group. Lipsonia lipsonae presents morphological similarities with the Santonian genus Sigalia. The costate test surface and sutures of the latter indicates that it evolved from a costate species. Accordingly, Lipsonia and Sigalia are the results of iterative evolution from two different heterohelicid groups. J. Micropalaeontol. 27(2): 117-123, November 2008.
Year of Publication: 2008
Research Program: DSDP Deep Sea Drilling Project
IPOD International Phase of Ocean Drilling
ODP Ocean Drilling Program
Key Words: 10 Paleontology, Invertebrate; Atlantic Coastal Plain; Atlantic Ocean; Blake Nose; Blake Plateau; Caribbean Sea; Central Pacific; Cretaceous; DSDP Site 111; DSDP Site 152; DSDP Site 305; DSDP Site 356; DSDP Site 357; DSDP Site 384; DSDP Site 463; DSDP Site 577; DSDP Site 95; Deep Sea Drilling Project; Exmouth Plateau; Foraminifera; Globigerina; Globigerinacea; Gulf of Mexico; Heterohelicidae; IPOD; Indian Ocean; Invertebrata; Leg 10; Leg 12; Leg 122; Leg 15; Leg 171B; Leg 174AX; Leg 198; Leg 32; Leg 39; Leg 43; Leg 62; Leg 86; Lipsonia lipsonae; Maestrichtian; Mesozoic; Microfossils; Mid-Pacific Mountains; Morphology; New taxa; Nicaragua Rise; North Atlantic; North Pacific; Northwest Pacific; ODP Site 1049; ODP Site 1050; ODP Site 1052; ODP Site 1212; ODP Site 761; ODP Site 762; Ocean Drilling Program; Pacific Ocean; Planktonic taxa; Protista; Rio Grande Rise; Rotaliina; SEM data; Senonian; Shatsky Rise; South Atlantic; Taxonomy; United States; Upper Cretaceous; Upper Maestrichtian; West Pacific; Wombat Plateau
Coordinates: N322700 N322700 E1574300 E1574300
N320007 N320008 E1575101 E1575059
N212101 N212101 E1744004 E1744004
N322628 N322632 E1574324 E1574323
Record ID: 2009059224
Copyright Information: GeoRef, Copyright 2018 American Geosciences Institute. Reference includes data from The Geological Society, London, London, United Kingdom